photodegradable

adjective
pho·to·de·grad·able | \ ˌfō-tō-di-ˈgrā-də-bəl \

Definition of photodegradable 

: chemically degradable by the action of light photodegradable plastics

First Known Use of photodegradable

1971, in the meaning defined above

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The first known use of photodegradable was in 1971

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